adverb, adverb taking the 'to' particle, noun or participle which takes 'suru'
lively; vividly; energetically
Describes a state of being full of life, energy, or freshness; often used for people, expressions, or descriptions.
彼女はいつも生き生きとしている。
She is always lively and full of energy.
その絵
The colors in that painting are vivid.
子供たちが公園で生き生きと遊んでいる。
The children are playing energetically in the park.